Ok thanks for that. Two more things:
- the commit message should be formatted to our coding standards (you can see it linebreaks in github interface - it shouldn't! You can also put a longer description after a blank line).
- I had a fresh look at this comment here, and it doesn't really describe *why* we are wrapping an URL with Image. It duplicates what the code already says. Say something like: "File::find will return the original image if we pass it the url of the resampled image - but we still want to serve the resmpled image"

How about that? Sorry for not catching these before.